如何使用 rails 直接写入数据库

Question

基本上我想绕过

def something=(string)
...
end

做

create!(:something => "direct to database")

出于某种原因，我很难绕过这个函数（我在迁移中使用它）。

Rails 版本是 3.1

Answer 1

instance.update_attribute(:something,"direct to database") # bypass validation

或

instance.something = "direct to database"
instance.save(validation = false)

或

sql = "UPDATE models SET something = 'direct to database' WHERE id = #{object.id}"
ActiveRecord::Base.connection.execute(sql)

Answer 2

model.update_column(:col, 'value')